C18.9
BillableMalignant neoplasm of colon, unspecified
Malignant neoplasm of colon, unspecified
Coding Notes
Inclusion Terms
Alternative clinical terms for this condition
- Malignant neoplasm of large intestine NOS
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
- •Kaposi's sarcoma of gastrointestinal sitesC46.4
- malignant carcinoid tumors of the colon (C7A.02-)
Excludes 2
Conditions not included here, but the patient may have both
Related Codes(9)
C18.0Malignant neoplasm of cecum
C18.1Malignant neoplasm of appendix
C18.2Malignant neoplasm of ascending colon
C18.3Malignant neoplasm of hepatic flexure
C18.4Malignant neoplasm of transverse colon
C18.5Malignant neoplasm of splenic flexure
C18.6Malignant neoplasm of descending colon
C18.7Malignant neoplasm of sigmoid colon
C18.8Malignant neoplasm of overlapping sites of colon
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(205)
SNOMED CT
- Primary malignant neoplasm of colon93761005
- Primary malignant neoplasm of large intestine93854002
- Carcinoma of colon269533000
- Local recurrence of malignant neoplasm of colon314965007
- Local recurrence of malignant tumor of colon314965007
- Local recurrence of malignant tumour of colon314965007
- HNPCC - hereditary nonpolyposis colon cancer315058005
- HNPCC - hereditary nonpolyposis colorectal cancer315058005
- Hereditary nonpolyposis colon cancer315058005
- Cancer of colon363406005
- Malignant neoplasm of colon363406005
- Malignant tumor of colon363406005
- Malignant tumour of colon363406005
- Cancer of large bowel363510005
- Cancer of large intestine363510005
- Malignant neoplasm of large intestine363510005
- Malignant tumor of large intestine363510005
- Malignant tumour of large intestine363510005
- Adenocarcinoma of large intestine408645001
- Cancer of colon, stage 3422375001
- Carcinoma of colon, stage III422375001
- Colon cancer, stage 3422375001
- Cancer of the colon, stage 2422581008
- Carcinoma of colon, stage II422581008
- Colon cancer, stage 2422581008
- Carcinoma of colon, stage IV422985007
- Colon cancer stage 4422985007
- Carcinoma of colon, stage I425213009
- Colon cancer stage 1425213009
- Squamous cell carcinoma of colon766981007
- Leiomyosarcoma of colon1156788007
- Primary malignant mesenchymal neoplasm of colon1197354001
- Primary sarcoma of colon1197354001
- FCCTX - familial colorectal cancer type X1197359006
- Familial colorectal cancer type X1197359006
- Primary carcinoma of colon1259436003
- Primary squamous cell carcinoma of colon1268635000
- Lymphoma of colon133751000119102
- Malignant bleeding tumor of large bowel46811000087102
- Malignant bleeding tumour of large bowel46811000087102
- Malignant neoplasm of large intestine with haemorrhage46811000087102
- Malignant neoplasm of large intestine with hemorrhage46811000087102
- Primary adenocarcinoma of colon1701000119104
UMLS
- COLON CANCERC0007102
- Cancer of ColonC0007102
- Cancer of colonC0007102
- Cancer of the ColonC0007102
- Cancer, ColonC0007102
- Cancer, ColonicC0007102
- Cancers, ColonC0007102
- Cancers, ColonicC0007102
- Colon CancerC0007102
- Colon CancersC0007102
- Colon Neoplasm, MalignantC0007102
- Colon Tumor, MalignantC0007102
- Colon cancerC0007102
- Colon cancer NOSC0007102
- Colonic CancerC0007102
- Colonic CancersC0007102
- Colonic cancerC0007102
- Colonic cancer NOSC0007102
- Malignant Colon NeoplasmC0007102
- Malignant Colon TumorC0007102
- Malignant Colonic NeoplasmC0007102
- Malignant Colonic TumorC0007102
- Malignant Neoplasm of ColonC0007102
- Malignant Neoplasm of the ColonC0007102
- Malignant Tumor of ColonC0007102
- Malignant Tumor of the ColonC0007102
- Malignant neoplasm of colonC0007102
- Malignant neoplasm of colon (disorder)C0007102
- Malignant neoplasm of colon, unspecifiedC0007102
- Malignant tumor of colonC0007102
- Malignant tumour of colonC0007102
- ca colonC0007102
- cancer colonicC0007102
- cancer colonsC0007102
- cancer of colonC0007102
- cancer of the colonC0007102
- colon caC0007102
- colon cancerC0007102
- colon cancersC0007102
- colonic cancerC0007102
- malignant colon neoplasmC0007102
- malignant neoplasm of colonC0007102
- of cancer colonC0007102
- of the colon cancerC0007102
- Cancer of large bowelC0346629
- Cancer of large intestineC0346629
- Colorectal neoplasms malignantC0346629
- Malignant Colorectal NeoplasmC0346629
- Malignant Colorectal TumorC0346629
- Malignant Large Bowel NeoplasmC0346629
- Malignant Large Bowel TumorC0346629
- Malignant Large Intestine NeoplasmC0346629
- Malignant Large Intestine TumorC0346629
- Malignant Neoplasm of Large BowelC0346629
- Malignant Neoplasm of Large IntestineC0346629
- Malignant Neoplasm of the Large BowelC0346629
- Malignant Neoplasm of the Large IntestineC0346629
- Malignant Tumor of Large BowelC0346629
- Malignant Tumor of Large IntestineC0346629
- Malignant Tumor of the Large BowelC0346629
- Malignant Tumor of the Large IntestineC0346629
- Malignant large intestinal neoplasm NOSC0346629
- Malignant neoplasm of large intestineC0346629
- Malignant neoplasm of large intestine (disorder)C0346629
- Malignant neoplasm of large intestine NOSC0346629
- Malignant tumor of large intestineC0346629
- Malignant tumour of large intestineC0346629
- cancer intestine largeC0346629
- cancer intestines largeC0346629
- cancer of large intestineC0346629
- large bowel cancerC0346629
- large intestine cancerC0346629
- of large bowel cancerC0346629
Clinical Terms
- Primary malignant neoplasm of colon
- Hereditary nonpolyposis colon cancer
- Colonic Cancers
- Malignant Colon Neoplasm
- Colon cancer, stage 3
- Colon cancer, stage 2
- Malignant neoplasm of large intestine
- Squamous cell carcinoma of colon
- cancer of large intestine
- Adenocarcinoma of large intestine
- Cancer of colon
- Colon Tumor, Malignant
- Cancer of colon, stage 3
- Malignant neoplasm of large intestine with haemorrhage
- Malignant Colonic Neoplasm
- of large bowel cancer
- Primary malignant mesenchymal neoplasm of colon
- Cancer of the Colon
- Malignant neoplasm of colon (disorder)
- HNPCC - hereditary nonpolyposis colorectal cancer
- Malignant Tumor of Colon
- Malignant tumour of large intestine
- Cancer, Colonic
- Local recurrence of malignant tumor of colon
- colon cancers
- Familial colorectal cancer type X
- Cancer, Colon
- Malignant large intestinal neoplasm NOS
- cancer colons
- large intestine cancer
- Cancers, Colonic
- Colonic cancer
- Carcinoma of colon, stage II
- Carcinoma of colon, stage III
- colon ca
- of the colon cancer
- Cancer of the colon, stage 2
- Malignant Colon Tumor
- cancer intestine large
- of cancer colon
- Primary sarcoma of colon
- Colon cancer NOS
- Carcinoma of colon
- Primary adenocarcinoma of colon
- Malignant Colorectal Tumor
- Cancer of large bowel
- Leiomyosarcoma of colon
- Colorectal neoplasms malignant
- Local recurrence of malignant tumour of colon
- Malignant Large Intestine Neoplasm
- Malignant bleeding tumour of large bowel
- Carcinoma of colon, stage IV
- Colon cancer stage 4
- cancer colonic
- Malignant Colonic Tumor
- Lymphoma of colon
- Malignant Neoplasm of the Large Intestine
- Malignant Tumor of Large Bowel
- ca colon
- Colon Neoplasm, Malignant
- Colonic cancer NOS
- Malignant Colorectal Neoplasm
- Primary carcinoma of colon
- Malignant tumour of colon
- Colon Cancer
- Malignant tumor of large intestine
- Malignant neoplasm of large intestine (disorder)
- Malignant Neoplasm of the Large Bowel
- large bowel cancer
- FCCTX - familial colorectal cancer type X
- HNPCC - hereditary nonpolyposis colon cancer
- Malignant neoplasm of large intestine NOS
- Cancers, Colon
- Malignant Tumor of the Large Bowel
- Malignant neoplasm of large intestine with hemorrhage
- Colon cancer stage 1
- Malignant Large Bowel Tumor
- cancer intestines large
- Malignant Tumor of the Colon
- Carcinoma of colon, stage I
- Malignant Large Intestine Tumor
- Primary malignant neoplasm of large intestine
- Malignant Large Bowel Neoplasm
- Local recurrence of malignant neoplasm of colon
- Primary squamous cell carcinoma of colon
- Malignant Neoplasm of Large Bowel
- Malignant Tumor of the Large Intestine
- Malignant bleeding tumor of large bowel
- Malignant Neoplasm of the Colon
Frequently Asked Questions
What is the ICD-10 code for malignant neoplasm of colon, unspecified?
The ICD-10-CM code for malignant neoplasm of colon, unspecified is C18.9. The full clinical description is "Malignant neoplasm of colon, unspecified". C18.9 is a billable/specific code that can be used on insurance claims and medical billing.
What does ICD-10 code C18.9 mean?
ICD-10-CM code C18.9 represents “Malignant neoplasm of colon, unspecified”. It is classified under Chapter 2: Neoplasms and is a billable/specific code that can be used on a claim.
Is C18.9 a billable code?
Yes, C18.9 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is C18.9 in?
C18.9 is in Chapter 2: Neoplasms (codes C00-D49).
What codes cannot be used with C18.9?
C18.9 has Excludes1 notes indicating codes that cannot be used together with it, including: Kaposi's sarcoma of gastrointestinal sites (C46.4); malignant carcinoid tumors of the colon (C7A.02-).
What SNOMED CT codes does C18.9 map to?
C18.9 maps to 21 SNOMED CT concepts: 408645001, 363406005, 422375001, 363510005, 422581008, and 16 more. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for C18.9?
C18.9 is linked to 2 UMLS Concept Unique Identifiers: C0007102, C0346629. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does C18.9 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like malignant neoplasm of colon, unspecified affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of C18.9?
C18.9 maps to the ICD-11 code: 2B90.Z (Malignant neoplasms of colon, unspecified).
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.